<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色按钮区域 -->
      <el-row>
        <el-col>
          <el-button type="primary" @click="addDialogVisible = true"
            >添加角色</el-button
          >
        </el-col>
      </el-row>
      <!-- 角色列表区域 -->
      <el-table :data="rolelist" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              :class="['bdbottom', i1 === 0 ? 'bdtop' : '']"
              v-for="(item1, i1) in scope.row.children"
              :key="item1.id"
              class="vcenter"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag
                  closable
                  @close="removeRightById(scope.row, item1.id)"
                  >{{ item1.authName }}</el-tag
                >
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <!-- 通过for循环嵌套渲染二级权限 -->
                <el-row
                  :class="[i2 === 0 ? '' : 'bdtop']"
                  v-for="(item2, i2) in item1.children"
                  :key="item2.id"
                  class="vcenter"
                >
                  <!-- 二级权限 -->
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @close="removeRightById(scope.row, item2.id)"
                      >{{ item2.authName }}</el-tag
                    >
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <!-- 三级权限 -->
                  <el-col :span="18">
                    <el-tag
                      type="warning"
                      v-for="item3 in item2.children"
                      :key="item3.id"
                      closable
                      @close="removeRightById(scope.row, item3.id)"
                    >
                      {{ item3.authName }}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>

            <!-- <pre>{{scope.row}}</pre>     -->
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column label="#" type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <!-- 编辑按钮 -->
            <el-button
              size="mini"
              type="primary"
              icon="el-icon-edit"
              @click="showEditDialog(scope.row.id)"
              >编辑</el-button
            >
            <!-- 删除按钮 -->
            <el-button
              size="mini"
              type="danger"
              icon="el-icon-delete"
              @click="removeRoleById(scope.row.id)"
              >删除</el-button
            >
            <!-- 分配权限按钮 -->
            <el-button
              size="mini"
              type="warning"
              icon="el-icon-setting"
              @click="showSetRightDialog(scope.row)"
              >分配权限</el-button
            >
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!-- 添加角色的对话框 -->
    <el-dialog
      title="添加角色"
      :visible.sync="addDialogVisible"
      width="50%"
      @close="addDialogClosed"
    >
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="80px"
      >
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部区域 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addRole">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 编辑角色的对话框 -->
    <el-dialog
      title="编辑"
      :visible.sync="editDialogVisible"
      width="50%"
      @close="editDialogClosed"
    >
      <el-form
        :model="editForm"
        :rules="editFormRules"
        ref="editFormRef"
        label-width="80px"
      >
        <el-form-item label="Id">
          <el-input v-model="editForm.roleId" disabled></el-input>
        </el-form-item>
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="editForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="editForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>

      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editRoleInfo">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 分配权限的对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close="setRightDialogClosed"
    >
      <!-- 树形控件 -->
      <el-tree
        :data="rightslist"
        :props="treeProps"
        show-checkbox
        node-key="id"
        default-expand-all
        :default-checked-keys="defKeys"
        ref="treeRef"
      ></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights"
          >确 定</el-button
        >
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  name: "Roles",
  data() {
    return {
      //所有角色列表数据
      rolelist: [],
      //所有权限的数据
      rightslist: [],
      //控制分配权限对话框的显示与隐藏
      setRightDialogVisible: false,
      //控制添加角色对话框的显示与隐藏
      addDialogVisible: false,
      //控制编辑角色对话框的显示与隐藏
      editDialogVisible: false,
      //查询到的用户信息
      editForm: "",
      //添加角色表单数据
      addForm: {
        roleName: "",
        roleDesc: "",
      },
      //添加表单的验证规则对象
      addFormRules: {
        roleName: [
          { required: true, message: "请输入角色名称", trigger: "blur" },
        ],
        roleDesc: [
          { required: true, message: "请输入角色描述", trigger: "blur" },
        ],
      },
      //修改表单的验证规则对象
      editFormRules: {
        roleName: [
          { required: true, message: "请输入角色名称", trigger: "blur" },
        ],
        roleDesc: [
          { required: true, message: "请输入角色描述", trigger: "blur" },
        ],
      },
      //树形控件的属性绑定对象
      treeProps: {
        label: "authName",
        children: "children",
      },
      //默认选中的节点Id值
      defKeys: [],
      //当前即将分配权限的角色Id
      roleId:'',
    };
  },
  methods: {
    //获取所有角色的列表
    async getRolesList() {
      const { data: res } = await this.$http.get("roles");
      if (res.meta.status !== 200)
        return this.$message.error("获取角色列表失败!");
      this.rolelist = res.data;
      //console.log(this.rolelist);
    },
    //监听添加角色对话框的关闭事件
    addDialogClosed() {
      this.$refs.addFormRef.resetFields();
    },
    //添加新角色
    addRole() {
      this.$refs.addFormRef.validate(async (valid) => {
        if (!valid) return;
        //可以发起添加角色的网络请求
        const { data: res } = await this.$http.post("roles", this.addForm);
        if (res.meta.status != 201) return this.$message.error("添加角色失败!");
        this.$message.success("添加角色成功!");
        //隐藏添加角色的对话框
        this.addDialogVisible = false;
        //重新获取角色列表数据
        this.getRolesList();
      });
    },
    //展示编辑角色的对话框
    async showEditDialog(id) {
      const { data: res } = await this.$http.get("roles/" + id);
      if (res.meta.status != 200)
        return this.$message.error("查询用户信息失败!");
      this.editForm = res.data;
      this.editDialogVisible = true;
    },
    //监听编辑角色对话框的关闭事件
    editDialogClosed() {
      this.$refs.editFormRef.resetFields();
    },
    //编辑角色信息并提交
    editRoleInfo() {
      this.$refs.editFormRef.validate(async (valid) => {
        if (!valid) return;
        //发起编辑角色的数据请求
        const { data: res } = await this.$http.put(
          "roles/" + this.editForm.roleId,
          {
            roleId: this.editForm.roleId,
            roleName: this.editForm.roleName,
            roleDesc: this.editForm.roleDesc,
          }
        );

        if (res.meta.status != 200) return this.$message.error("更新角色失败!");
        //关闭对话框
        this.editDialogVisible = false;
        //刷新数据列表
        this.getRolesList();
        //提示修改成功
        this.$message.success("更新角色信息成功!");
      });
    },
    //根据Id删除对应的角色信息
    async removeRoleById(id) {
      //弹框询问用户是否删除数据
      const confirmResult = await this.$confirm(
        "此操作将永久删除该角色, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning",
        }
      ).catch((err) => {
        return err;
      });

      //如果用户确认删除，则返回值为字符串 confirm
      //如果用户取消删除，则返回值为字符串 cancel
      if (confirmResult != "confirm") return this.$message.info("已取消删除");
      const { data: res } = await this.$http.delete("roles/" + id);
      if (res.meta.status != 200) return this.$message.error("删除用户失败!");
      this.$message.success("删除用户成功!");
      this.getRolesList();
    },
    //根据Id删除对应权限
    async removeRightById(role, rightId) {
      //弹框提示用户是否删除
      const confirmResult = await this.$confirm(
        "此操作将永久删除该文件, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning",
        }
      ).catch((err) => err);

      if (confirmResult !== "confirm") return this.$message.info("取消了删除!");
      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      );
      if (res.meta.status !== 200) return this.$message.error("删除权限失败!");
      role.children = res.data;
    },
    //展示分配权限的对话框
    async showSetRightDialog(role) {
      this.roleId = role.id
      //获取权限的数据
      const { data: res } = await this.$http.get("rights/tree");
      if (res.meta.status !== 200) return this.$message("获取权限数据失败!");
      //把获取到的权限数据保存到data中
      this.rightslist = res.data;

      //递归获取三级节点的Id
      this.getLeafKeys(role, this.defKeys);

      this.setRightDialogVisible = true;
    },
    //通过递归形式，获取角色下所有三级权限的id，保存到defKeys数组
    getLeafKeys(node, arr) {
      //如果当前node节点不包含children属性则是三级节点
      if (!node.children) {
        return arr.push(node.id);
      }
      node.children.forEach((item) => this.getLeafKeys(item, arr));
    },
    //监听分配权限对话框的关闭事件
    setRightDialogClosed() {
      this.defKeys = [];
    },
    //点击为角色分配权限
    async allotRights(){
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      const idStr = keys.join(',')

      const {data:res} = await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})
      if(res.meta.status !== 200) return this.$message('分配权限失败!')
      this.$message.success('分配权限成功!')
      this.getRolesList()
      this.setRightDialogVisible = false
    }
  },
  created() {
    this.getRolesList();
  },
};
</script>

<style scpoed>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>